图9. 不同位置时效态TNM合金室温拉伸断口形貌及BSE-SEM像
Fig.9. Fracture surfaces (a, b), corresponding BSE-SEM images (c, d) and crack nucleation details (e, f) of samples of edge (a, c, e) and center (b, d, f) positions of extrusion-ageing TNM alloy